Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual é o ano da música com o título "little sister"?
 ###Tabelas: CREATE TABLE list_of_songs_released_in_2007 (list_of_songs_released_in_2007_id AUTO_INCREMENT PRIMARY KEY, Song title VARCHAR, Artist VARCHAR, Year INT, Genre VARCHAR, Single / Pack name VARCHAR, Release date VARCHAR, Family Friendly VARCHAR, Additional Rock Band 3 Features VARCHAR) CREATE TABLE bowling_average (bowling_average_id AUTO_INCREMENT PRIMARY KEY, Player VARCHAR, Team VARCHAR, Matches INT, Overs VARCHAR, Wickets INT, Economy Rate VARCHAR, Average VARCHAR, Strike Rate VARCHAR, BBI VARCHAR, BBM VARCHAR) CREATE TABLE affiliate_members (affiliate_members_id AUTO_INCREMENT PRIMARY KEY, Institution VARCHAR, Location VARCHAR, Founded INT, Type VARCHAR, Enrollment INT, Nickname VARCHAR, Current Conference VARCHAR, Pac-12 Sports VARCHAR) CREATE TABLE eliminated_contestants'_weigh_in (eliminated_contestants'_weigh_in_id AUTO_INCREMENT PRIMARY KEY, Contestant VARCHAR, Starting Weight (kg) VARCHAR, Final Weight (kg) VARCHAR, Weight Lost (kg) VARCHAR, Percentage Lost VARCHAR, Position (out of Eliminated Contestants) VARCHAR) CREATE TABLE career_stats (career_stats_id AUTO_INCREMENT PRIMARY KEY, Season VARCHAR, PAT Pct. VARCHAR, 20-29 VARCHAR, 30-39 VARCHAR, 40-49 VARCHAR, FG-FGA VARCHAR, FG Pct. VARCHAR, Long INT, Points INT)  
SELECT Year FROM list_of_songs_released_in_2007 WHERE Song title = " Little Sister "